PM4328 View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM4328' PDF : 250 Pages View PDF
STANDARD PRODUCT
DATASHEET
PMC-2011596
ISSUE 1
Figure 7: CRC Multiframe Alignment Algorithm
PM4328 TECT3
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
Out of Frame
3 consecutive FASor NFAS
errors; manual reframe; or
excessive CRC errors
FAS_Find_1
FAS_Find_1_Par
FA S
found
NF AS
not found
nex t fram e
FA S
found
NF AS
not found
nex t fram e
NFAS_Find
NF AS
found
nex t fram e
FA S
not found
next fram e
NFAS_Find_Par
NF AS
found
nex t fram e
FA S
not found
nex t fram e
FAS_Find_2
FAS_Find_2_Par
FA S
found
nex t fram e
8ms ex pire
Start 400ms timer
and 8ms timer
FA S
found
nex t fram e
Start 8ms timer
BFA
8m s expire and
NOT( 400 ms exp ire)
BFA_Par
CR CMF A
Reset BFA to
most recently
found alignment
CR CM FA_ Par
CRCto CRC
Interworking
CR CM FA_ Par
(Op tional setting)
CRCto non-CRC
Interworking
400m s
ex pi r e
PROPRIETARY AND CONFIDENTIAL
59
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